TS 23.527
CT4
★
5G System — Restoration Procedures
use "3GPP‑Page" to get the Word version
use "ETSI‑search" to get the PDF version
for a better overview, the Table of Contents (ToC) is reproduced
use "ETSI‑search" to get the PDF version
for a better overview, the Table of Contents (ToC) is reproduced
V16.2.0 (Wzip)
2019/12 19 p.
V15.3.0 (PDF)
2019/06 22 p.
WI Acronym: 5GS_Ph1-CT
Rapporteur: Mr. Wild, Peter A. Vodafone GmbH
Rapporteur: Mr. Wild, Peter A. Vodafone GmbH
The present document defines the restoration procedures in the 5G System, related to:
- the N4 Interface,
- the User Plane Interfaces N3 and N9,
- Service-Based Interfaces,
- Public Warning System (PWS).
full Table of Contents for TS 23.527 Word version: 16.2.0
1 Scope Word-p. 5
2 References
3 Definitions and abbreviations
4 Restoration Procedures related to the N4 Interface Word-p. 6
4.1 General
4.2 N4 Failure and Restart Detection
4.3 UPF Restoration Procedures
5 Restoration Procedures related to the User Plane Interfaces N3 and N9
4.3.1 General
4.3.2 Restoration Procedure for PSA UPF Restart 
4.3.3 Restoration Procedure for PSA UPF Failure without Restart
4.3.4 Restoration Procedure for Intermediate UPF Restart
4.3.5 Restoration Procedure for Intermediate UPF Failure without Restart Word-p. 7
4.4 SMF Restoration Procedures
4.3.3 Restoration Procedure for PSA UPF Failure without Restart
4.3.4 Restoration Procedure for Intermediate UPF Restart
4.3.5 Restoration Procedure for Intermediate UPF Failure without Restart Word-p. 7
4.4.1 General
4.4.2 Restoration Procedure for SMF Restart
4.4.3 Restoration Procedure for SMF Failure without Restart Word-p. 8
4.5 N4 path failure
5.1 General
5.2 User Plane Failure Detection
5.3 Restoration Procedures upon Loss of GTP-U contexts
6 Restoration Procedures related to Service-Based Interfaces Word-p. 11
5.2 User Plane Failure Detection
5.3 Restoration Procedures upon Loss of GTP-U contexts
5.3.1 General
5.3.2 Procedure for GTP-U Error Indication received from 5G-AN Word-p. 9
5.3.3 Procedure for GTP-U Error Indication received from UPF Word-p. 10
5.4 Restoration Procedures upon User Plane Path Failure
6.1 General
6.2 NF (NF Service) Failure and Restart Detection using the NRF
6.3 NF Service Producer Restart Detection using direct signalling between NFs Word-p. 14
6.4 NF Service Consumer Restart Detection using direct signalling between NFs Word-p. 15
6.5 NF Service Instance Reselection Word-p. 17
7 Restoration Procedures related to Public Warning System (PWS)
A Change history Word-p. 19
